It's probably because of how taxes and the government works is different in many ways to the US:
1. You feel it on your own wallet how your tax is spent and redistributed. Even though I pay a large amount in tax, being a high earner, I also get support from the government, paid monthly, for childcare and mortgage interests. Also, the government supports programs like no-downpayment mortgages, that are unheard of in many countries.
2. Public services are visible and efficient. This is true from healthcare to garbage collection and schools. Schools are actually a good example: while daycare in amsterdam would cost around $2,000/month for a child, schools are "free". Of course, once you paid for daycare, you know that it's not free, but paid for from tax, and have a good idea how much goes back into it.
3. Tax returns are ridiculously simple. They can also be done up to five years in the past, in case you forgot to claim refunds.
4. Thanks to how taxes are spent, there is less inequality across society. The government invests in social housing nationwide and has strong social net support, redistributing wealth via taxes from high earners to the low earners. For example, the $2,000/month childcare costs: for low earners the government pays up to 97% of this, dropping to 33% for people well off. Contrast this with places that don't have any of this and the inequality can be seen in all parts of life.